ESP32 - Keep the deep sleep timing when other wakeup source occurs

Projects Programming
1

I'm working on a system that should wakeup every 2 minutes to perform a specific task and come back to sleep. During the sleep I need to count the edges (rise and fall) of a signal so I implemented the EXT1 wakeup too. But when the system wakes up by EXT1, if I use only the esp_sleep_enable_ext1_wakeup function to come back to sleep the timer wakeup is disabled, so I need to know how many seconds remains to the next timer wakeup and use them with the esp_sleep_enable_timer_wakeup function.

How can I keep the deep sleep timing when other wakeup source occurs?

2

Use the ULP, that's the other ESP32's processor, to keep track of things while the main processor is sleeping.

3

An example would be nice :grinning:. Anyway I solved my problem with the time( NULL ) that keep the time elapsed since the system power up, also in deep sleep. I don't know if it's the best solution but it works!

4

Here is a nice,

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/search.html?q=ulp&check_keywords=yes&area=default

5

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